/*

 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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 */

/*

 * @test

 * @bug 8063086

 * @summary X^2 special case for C2 yields different result than interpreter

 * @library /testlibrary /test/lib /compiler/whitebox /

 * @modules java.management

 * @build TestPow2

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

 *                   -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestPow2

 *

 */

import java.lang.reflect.*;

import sun.hotspot.WhiteBox;

import compiler.whitebox.CompilerWhiteBoxTest;

public class TestPow2 {

    private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();

    private static final double base = 5350.456329377186;

    private static final double exp = 2.0;

    static double m() {

        return Math.pow(base, exp);

    }

    static public void main(String[] args) throws NoSuchMethodException {

        Method test_method = TestPow2.class.getDeclaredMethod("m");

        double interpreter_result = m();

        // Compile with C1 if possible

        WHITE_BOX.enqueueMethodForCompilation(test_method, CompilerWhiteBoxTest.COMP_LEVEL_SIMPLE);

        double c1_result = m();

        WHITE_BOX.deoptimizeMethod(test_method);

        // Compile it with C2 if possible

        WHITE_BOX.enqueueMethodForCompilation(test_method, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);

        double c2_result = m();

        if (interpreter_result != c1_result || interpreter_result != c2_result ||

            c1_result != c2_result) {

            System.out.println("interpreter = " + interpreter_result + " c1 = " + c1_result + " c2 = " + c2_result);

            throw new RuntimeException("Test Failed");

        }

    }

}